Ufortunately i didn't receive anything here. Not very exciting but i
believe that negative results should also be reported.
The spectrograms:
https://klubnl.pl/grabber/grabber_sq5bpf_2970.png
https://klubnl.pl/grabber/grabber_sq5bpf_2970_avg.png
Right now i use the same settings as on my 5170Hz grabber: a 3kHz wide
filter centered on 2970Hz, followed by vtblank -a1.4 -d0 -t100 (vtblank
from old vlfrx-tools). I would be grateful for any suggestions how to
improve this, maybe the filter is too wide (and lets too many 50Hz
harmonics through. which upset the blanker).
The antenna isn't optimised for ULF.
VY 73
Jacek / SQ5BPF
On Sun, 30 Dec 2018, DK7FC wrote:
Date: Sun, 30 Dec 2018 12:38:04 +0100
From: DK7FC <[email protected]>
Reply-To: [email protected]
To: [email protected]
Subject: ULF: Carrier on 2970.01 Hz
Hi ULF,
The accu is fully recharged and i am on the hill again, transmitting on the
ground loop antenna. This time, the accu has even more power. The TX power is
520 W (!), the DC measurement tells i need just 64 V for 1 A, and now, at
2970.01 Hz i am getting a record antenna current of 2.75 A!!
The carrier ison the air since 11:17 UTC and i intend to run it for 2 hours
again, like yesterday.
Reports are welcome :-)
73, Stefan
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